飞秒激光在对氨基偶氮苯薄膜表面上制备微偏振元件

华东师范大学学报(自然科学版) ›› 2012, Vol. 2012 ›› Issue (5): 10-15.

飞秒激光在对氨基偶氮苯薄膜表面上制备微偏振元件

彭雪影，贾天卿，孙真荣

华东师范大学精密光谱科学与技术国家重点实验室，上海 200062

收稿日期:2011-11-01 修回日期:2012-02-01 出版日期:2012-09-25 发布日期:2012-09-29

Micopolarization elements on p-aminoazobenzene film induced by femtosecond laser pulses

PENG Xue-ying, JIA Tian-qing, SUN Zhen-rong

State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China

Received:2011-11-01 Revised:2012-02-01 Online:2012-09-25 Published:2012-09-29

摘要/Abstract

摘要： 用400 nm和800 nm线偏振飞秒激光垂直聚焦于对氨基偶氮苯薄膜表面上，以形成纳米微结构.实验观察到400 nm和800 nm线偏光照射样品表面分别得到周期为210 nm和500 nm的干涉条纹，条纹周期均随激光能流密度的增强而增大.通常认为这种周期结构是由入射激光与材料表面的散射光相干涉所形成的：光的干涉引起材料表面温度呈现梯度变化，从而引起表面张力呈现梯度变化，诱导周期条纹的产生.制备偶氮聚合物的厚膜，用400 nm飞秒激光照射样品表面，同样也得到周期性纳米微结构.

关键词: 光学材料, 飞秒激光, 对氨基偶氮苯, 微偏振元件, 周期结构

Abstract: Fabrication of nanostructures on a surface of p-aminoazobenzene polymer film illuminated by 400 nm and 800 nm femtosecond laser was studied. Ripples with periods of 210 nm and 500 nm were produced by linearly polarized 400 nm and 800 nm femtosecond laser pulses, respectively. The periods of the ripples increase with increasing the intensity of incident laser pulses. The interference of this diffracted optical wave with the incident beam gives rise to optical interference ripples. Gradient of surface tension is induced by the surface temperature gradient caused by the interfered light. The gradient of surface tension gives rise to the periodical ripple structures. Thick polymer film was made and illuminated by 400 nm femtosecond laser，and periodic nanostructures were also been observed.

Key words: optical material, femtosecond laser, p-aminoazobenzene, micopolarization elements, periodic nanostructures

中图分类号:

O431.1

彭雪影，贾天卿，孙真荣. 飞秒激光在对氨基偶氮苯薄膜表面上制备微偏振元件[J]. 华东师范大学学报(自然科学版), 2012, 2012(5): 10-15.

PENG Xue-ying, JIA Tian-qing, SUN Zhen-rong. Micopolarization elements on p-aminoazobenzene film induced by femtosecond laser pulses[J]. Journal of East China Normal University(Natural Sc, 2012, 2012(5): 10-15.

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